I have synthesized my polymer, which is a 30 mer. It's in powder state after purification, and it is soluble in DMSO (tried THF, Acetonitrile, etc., it seems only DMSO with sonicating works).
My final goal is to identify if my polymer has entanglements. Based on what I've read small angle oscillatory shear could give me the necessary information I need to identify entanglements at this molecular weight of my polymer. However, I'm really short on resources, is there any book or paper you would like to recommend that explains some hands on approach on how to start? I've gathered some info on geometry and type of rheometer I want to use, however, I'm confused on sample prep., like how to turn the powder into a melt?
Dear Mohammad Samani, I think 30 mer repeating units is not enough to say it is a polymer or even an oligomer. To detect the onset of entanglements presence you have to détermine the threshold at which it forms. This is done by studying viscosity evolution or modulus as a function of molecular weights. My Regards
Abdelkader BOUAZIZ Yeah I'm not assuming that I have entanglements, this is actually just to see if I have any, I plan to go for higher MWs too. If you have any knowledge to share on the question though it would be appreciated.
If you don't mind, can you name the polymer you are dealing with ? I have many documents on this topic.
Abdelkader BOUAZIZ It's a 30 mer of poly glycine, its structure is close to nylon-2 I would say.
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